Map showing current Colorado state county boundaries with color-coded delineations of Mexican-Spanish land grants.  Yellow shows the Vigil & St. Vrain Grant which included parts of current Las Animas, Huerfano, Pueblo & Otero counties. Green shows the Maxwell Grant which included the current southwestern portion of Las Animas County. Orange shows the Sangre de Cristo Grant which included all of present-day Costilla County. Pink shows the Conejos Grant which included all of current Conejos and Rio Grande counties as well as a small northeastern portion of Mineral County, a small portion of southern Saguache County and western Alamosa County. Blue shows the Tierra Amarilla Grant which included the southeastern portion of current Archuleta County. Red shows the Nolan Grant which included a portion of present-day western Pueblo County. Purple shows the Luis Baca Grant which included a small portion of current southeastern Saguache County. Back to Map Page